I added a female beagle puppy to our family about five months ago.
She is a beautiful, melt your heart dog. My soul dog.
From my experience, my Annie is very intelligent. I began training as soon as she was comfortable at our home. At eight months old, she knows all her basics, voice and hand commands. She also knows little tricks, "Paw", "Hug"...
She is vocal but not overly, but my family doesn't mind the occasional barking/howling. She thinks she is the protector of our house. Generally just barks when she thinks there is something worth barking at.
She does love to wander...and follows her nose in every way. The only problem I have with Annie is her recall. She has the tendency to not come when called. But we are working on it together. And we are doing whistle training as a new way of recall. She is responding well. And getting better everyday.
Beagles are notorious for being slow in housebreaking. Annie was no exception. It took her about three to four months to get it down pat. Just be patient and it will come, if you decide have the beagle in the house.
Also, I read somewhere that Beagles do not have a trigger in their brain that says, "I'm full." Hence they can gain weight easily.
They shed, but they don't drool. They can be stubborn too! Introduce them to cats and small animals early...if you do that with the correct training, I believe they can live together peacefully.
And in Annie's case, a tired Beagle is a happy Beagle!
But for the most part, at least in my Annie's case, she is willing to please, and wants to be with her family all the time. She has an independent streak. But overall, one of the best dogs I have ever had.
Good luck in your search and decision!